1.   I was useless at school -- always in the bottom set in every subject.

2.   Police checkpoints proved useless at stopping the suicide bombers.

3.   We may be useless at football, cricket and the Eurovision Song Contest, but there is still ONE thing that the English excel at.

4.   But for now, her card is useless at Banco Popular.

5.   The Washington Establishment, campaign consultants, his parents and Christian conservatives are useless at this stage.

6.   Those plastic combs that come with lice-killing shampoo are practically useless at trapping nits.

a. + at >>共 1015
available 7.61%
present 4.05%
surprised 2.72%
hard 1.43%
amazed 1.19%
successful 1.08%
dead 1.03%
aimed 1.02%
located 0.99%
effective 0.81%
useless 0.03%
useless + p. >>共 28
for 20.60%
in 18.73%
to 14.23%
without 10.49%
as 8.61%
against 7.49%
on 3.75%
by 3.37%
at 2.25%
with 1.12%
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